Plug



FIG. 1 is a perspective view of a plug, showing my design.

FIG. 2 is a perspective view thereof.

FIG. 3 is a front elevation view thereof.

FIG. 4 is a rear elevation view thereof.

FIG. 5 is a left side elevation view thereof.

FIG. 6 is a right side elevation view thereof.

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines depict portions of the plug that form no part of the claimed design. 

CLAIM The ornamental design for the plug, as shown and described. 